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Ответ:
A)
Control: untouched dishDependent variable: the different salt concentrations for preventing the growth of bacteriaIndependent variable: agarB)
Control: the group that is not exposed to any pollutant (5th group)Dependent variable: the effect of pollution on soybean plantsIndependent variable: the pollutantОтвет:
2. Nucleus
3. Diffusion